﻿278 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  to 
  olive 
  argillaceous 
  shales 
  in 
  which 
  no 
  fossils 
  were 
  found. 
  The 
  

   Bloom 
  and 
  other 
  quarries 
  on 
  the 
  hillside 
  east 
  of 
  Lawrenceville 
  

   have 
  massive 
  sandstones, 
  bluish 
  gray 
  in 
  color, 
  banded 
  with 
  lines 
  

   of 
  a 
  slightly 
  different 
  shade, 
  which 
  do 
  not 
  split 
  into 
  thin, 
  flagging 
  

   stones 
  but 
  into 
  thicker 
  layers. 
  These 
  stones 
  are 
  harder 
  than 
  the 
  

   Hamilton 
  flags 
  and 
  they 
  are 
  cut 
  into 
  blocks 
  for 
  paving. 
  No 
  fos- 
  

   sils 
  were 
  found 
  in 
  them 
  and 
  since 
  olive 
  argillaceous 
  shales 
  are 
  

   interstratified 
  with 
  the 
  sandstones 
  they 
  are 
  referred 
  to 
  the 
  Sher- 
  

   burne 
  formation. 
  At 
  the 
  place 
  where 
  the 
  Lawrenceville 
  road 
  

   crosses 
  the 
  small 
  brook 
  which 
  is 
  followed 
  down 
  the 
  eastern 
  side 
  

   of 
  this 
  ridge 
  into 
  the 
  Kaaterskill 
  creek 
  valley 
  are 
  typical 
  blue 
  

   Hamilton 
  shales 
  containing 
  characteristic 
  fossils. 
  

  

  1 
  Spirifer 
  granulosus 
  (Con.) 
  Hall 
  (rr) 
  

  

  2 
  Palaeoneilo 
  oonstricta 
  Hall 
  (rr) 
  

  

  3 
  Grammysia 
  alveata 
  (Con.) 
  Hall 
  (rr) 
  

  

  4 
  Schizodus 
  appressus 
  (Con.) 
  Hall 
  (rr) 
  

  

  5 
  Elymella 
  nuculoides 
  Hall 
  (rr) 
  

  

  6 
  Pleurotomaria 
  sulcomarginata 
  Con. 
  (r) 
  

  

  7 
  Bellerophon 
  lyra 
  Hall 
  (rr) 
  

  

  8 
  Spirophyton 
  velum 
  Van. 
  (rr) 
  

  

  This 
  outcrop 
  is 
  some 
  300 
  feet 
  higher 
  than 
  the 
  Kaaterskill 
  creek 
  

   which 
  flows 
  northeasterly 
  for 
  five 
  and 
  one 
  half 
  miles 
  at 
  the 
  east- 
  

   ern 
  base 
  of 
  this 
  steep 
  ridge. 
  The 
  greater 
  part 
  of 
  the 
  Kaaterskill 
  

   valley 
  for 
  this 
  portion 
  of 
  its 
  course 
  has 
  been 
  cut 
  out 
  of 
  the 
  com- 
  

   paratively 
  soft 
  Marcellus 
  shales 
  which 
  are 
  shown 
  on 
  the 
  eastern 
  

   bank 
  south 
  of 
  the 
  bridge 
  on 
  the 
  road 
  from 
  Catskill 
  through 
  Kis- 
  

   katom 
  to 
  Palenville. 
  The 
  western 
  side 
  of 
  the 
  ridge 
  to 
  the 
  east 
  

   of 
  the 
  creek 
  is 
  composed 
  of 
  the 
  Onondaga 
  limestone, 
  the 
  distri- 
  

   bution 
  of 
  which 
  is 
  well 
  shown 
  on 
  Prof. 
  Davis's 
  map 
  of 
  "The 
  folded 
  

   Helderberg 
  limestones 
  in 
  Greene 
  county, 
  N. 
  Y." 
  a 
  

  

  The 
  rocks 
  to 
  the 
  west 
  of 
  this 
  bridge 
  forming 
  the 
  first 
  terrace 
  

   are 
  no. 
  132 
  of 
  Mather's 
  section 
  from 
  Catskill 
  mountain 
  to 
  the 
  

   Kaaterskill 
  creek 
  which 
  he 
  described 
  as 
  " 
  Dark 
  shales 
  and 
  shaly 
  

   grits 
  and 
  flags, 
  of 
  several 
  hundred 
  feet 
  in 
  thickness, 
  embracing 
  

  

  a 
  Bulletin 
  Museum 
  comparative 
  zoology, 
  v. 
  7, 
  Geol. 
  series, 
  v. 
  1, 
  no. 
  9, 
  1883, 
  pi. 
  13. 
  

  

  